Hi MrMatt, please forgive me for my bad languagge, I try to explain you again

I star up my P60 as usually....... I wait ok from ecu and spool up the max rpm for setting parameters........... at this moment if I move the trottle stick to idle so fast the engine decrease rpm and sometimes have a shut off for too low rpm, instead if I move the trottle slowly the engine dont shut off, to remedy I have increased the idle at 51000/52000 rpm and the engine run perfectly.

I hope you can understam me